JP3322567B2 - Ship propulsion motor and its installation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing an electric motor used for propulsion of a ship (including a submersible and an underwater vehicle) in a ship.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional marine propulsion motor has a stator 2 incorporated in a casing 1 and a rotor shaft disposed so as to be surrounded by the stator 2. The rotor shaft 3 is formed solid with a rotor 4 with 3 attached. When the electric motor is installed in the ship, as shown in FIG. 3, when the welded hull structure is almost completed and the welding distortion is absorbed, the light source 5 is provided at the bow-side reference point of the electric motor. A plurality of slits 6 are provided so as to be aligned with the coaxial rays so that 5 can be seen through from a peephole position 10 serving as a rear reference point of the hull.

[0003] Next, the position where the electric motor is to be installed is marked with reference to the position of the slit 6, and the stern tube 8 into which the propeller shaft 7 is to be inserted is centered.

At this time, since the rotor shaft 3 of the electric motor has a solid structure, the electric motor cannot be installed at a proper position in the ship, and there is no appropriate free space in other places in the ship. The motor is temporarily placed outside the hull structure to avoid obstruction on the coaxial beam from the light source 5. After the above marking is completed, the notch 11
The motor is conveyed into the ship through the, and the motor is installed and fixed in accordance with the marking.

[0005]

By the way, the following problems arise in the above-mentioned conventional marine propulsion motor and its installation method. (1) When the rotor shaft transmission torque increases in a large-output marine propulsion motor, the secondary moment of area and the weight of the rotor shaft increase. (2) As the weight of the rotor shaft increases, the size of the bearing increases, and the weight of the bearing also increases. (3) In the shipbuilding process, the installation of the motor for propulsion of the ship is performed after the alignment of the stern tube and the marking of the installation position of the motor for propulsion. (4) The hull structure (pressure hull structure in the case of submersibles) is cut off or closed after installation for installation of the motor for ship propulsion, which increases the work of construction. (5) Prior to installation of the motor for ship propulsion, alignment for positioning is performed, which increases the work of construction such as surveying and marking. An object of the present invention is to address the above problems.

[0006]

In order to solve the above-mentioned problems, a marine vessel propulsion motor according to the present invention has a stern propeller shaft centerline and a rotor shaft centerline aligned with each other for propulsion of a ship. The motor to be equipped is characterized in that the rotor shaft of the motor is provided with a through hole for centering which penetrates along a central axis thereof.

As described above, in a ship propulsion motor,
If a through hole for centering is formed along the center axis of the rotor shaft, the motor is installed in the ship, and the centering operation is performed while the through hole of the rotor shaft is directly seen through. The ship propulsion motor was temporarily placed outside the hull structure, indirect alignment was performed, and the installation position of the motor was marked on the ship, as before. The troublesome work of installing the electric motor in the ship so as to match the marking becomes unnecessary.

In the case of a large-output marine propulsion motor,
Although it is necessary to increase the second moment of area of the rotor shaft, when a through hole is provided in the rotor shaft and the rotor shaft has a hollow structure as in the present invention, a solid rotation having the same second moment of area is obtained. The cross-sectional area of the shaft is reduced as compared with the child shaft, and the weight can be reduced.

Further, the marine vessel propulsion motor according to the present invention is characterized in that transparent plates are respectively mounted on both ends of the through holes, and a mark indicating the center of the cross section of the rotor shaft is described on the transparent plates. Therefore, when the motor is installed in the ship and the centering operation is performed, the mark indicating the center of the rotor shaft cross section described on each transparent plate at both ends of the through hole is both on the see-through line. Fine adjustment of the position of the electric motor can be performed in such a way as to match the position of the motor, and thus the centering operation can be performed efficiently and simply.

In addition, the method for installing a motor for marine vessel propulsion according to the present invention is a method for installing a motor for marine vessel propulsion in a ship, which includes a propeller shaft inserted into a stern tube and a rotor shaft of the motor for driving the propeller shaft. When performing the centering of the motor, a through-hole is formed in the rotor shaft of the motor in advance along the center axis thereof, and the motor is installed in the ship, and a reference point in front of the rotor shaft of the motor is provided. After the light source is installed, then the center of the propeller shaft is centered so that the light source can be seen through the through hole of the rotor shaft from the peep hole at the reference point at the rear of the hull on the center line of the propeller shaft.
It is characterized in that the electric motor is installed and fixed.

In the above-mentioned method, the centering operation for aligning the rotor shaft of the motor for propeller shaft with the light source through the through hole in the rotor shaft of the motor for ship propulsion installed on the ship is performed. It will be performed efficiently and properly.

[0012] Then, the propulsion motor is installed in the ship at an early stage, and the propulsion motor temporarily placed outside the hull structure as in the related art is moved into the ship after marking the installation position. In addition, there is no need to consider the hull notch hole and work to close it, and the amount of construction work can be greatly reduced as compared with the conventional case.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a marine vessel propulsion motor according to the present invention, and FIG. It is a stern longitudinal cross-sectional view which shows the method of performing installation fixation.

As shown in FIG. 1, also in the case of the marine vessel propulsion motor according to the present embodiment, the stator 2 is incorporated in the casing 1 and the rotating motor is disposed so as to be surrounded by the stator 2. The rotor shaft 3 is provided with a rotor 4 having a child shaft 3. In the present embodiment, in particular, the rotor shaft 3 is formed with a through hole 12 for centering which penetrates along a central axis thereof.

Glass or plastic transparent plates 13 and 14 are attached to the front end and the rear end of the through hole 12, respectively. Mark is shown. In addition, when the mark of + mark is described on one transparent plate 13 as the above mark, it is good to describe the mark of X mark on the other transparent plate 14 so that the alignment of both marks can be easily confirmed with a US mark. .

As described above, in the marine propulsion motor,
When a through hole 12 for centering is formed along the center axis of the rotor shaft 3, the motor is installed in the ship, and the reference point is directly seen through the through hole 12 of the rotor shaft 3. In this way, the centering work can be performed efficiently while the motor for ship propulsion is temporarily placed outside the hull structure as in the past, and the indirect centering work is performed to mark the installation position of the motor. It is not necessary to perform such a troublesome work as installing the electric motor in the ship so as to conform to the markings after the application on the ship.

In the case of a large-output marine propulsion motor,
Although it is necessary to increase the second moment of area of the rotor shaft 3, when the through hole 12 is provided in the rotor shaft 3 and the rotor shaft 3 has a hollow structure as in the present embodiment, the same second moment of area is generated. The shaft cross-sectional area is reduced as compared to a solid rotor shaft having
The weight can be reduced.

Further, in the motor for marine vessel propulsion according to the present embodiment, the mark indicating the center of the cross section of the rotor shaft 3 is described on the transparent plates 13 and 14 attached to both ends of the through hole 12, so that the motor When performing the alignment work by installing on the ship,
Marks on the transparent plates 13 and 14 at both ends of the through hole 12
Fine adjustment of the position of the electric motor can be performed so that both are aligned on the line of sight, and thus the centering operation can be performed efficiently and easily.

Next, a method of installing the above-mentioned motor for ship propulsion in a ship and performing centering and fixing the same will be specifically described. As shown in FIG. 2, during the assembly and construction of the hull by welding, as shown in FIG. After the motor M is installed in the ship at an early stage and the welding work of the hull is completed and the welding distortion is absorbed, the center of the propeller 9 at the stern is aligned with the center line of the propeller shaft. The light source 5 is visually observed from a peephole position 10 through a through hole 12 formed in advance on the shaft 3.
It is done by seeing through.

That is, the light source 5 is installed at a reference position in front of the rotor shaft 3, and the light source 5 is seen through the through hole 12 from a peephole position 10 at a reference point behind the stern. At that time, the mark indicating the center of the rotor shaft transverse cross section written on the transparent plates 13 and 14 at the front and rear ends of the through hole 12 of the rotor shaft 3 is aligned with a predetermined see-through line,
Fine adjustment of the position of the electric motor M is performed, and its installation is fixed.

A plurality of slits 6 are provided along the line of sight, and the stern tube 8 into which the propeller shaft 7 of the propeller 9 is to be inserted is aligned with reference to the position of the slit 6. .

In the method described above, the light source 5 is seen through the through hole 12 in the rotor shaft 3 of the motor M for marine propulsion installed on the ship, and the rotor shaft 3 of the motor is connected to the propeller shaft 7. Alignment work for alignment can be performed efficiently and appropriately.

The installation of the propulsion motor M inside the ship is performed early, and the propulsion motor temporarily placed outside the hull structure as in the prior art is moved into the ship after marking the installation position. There is no need to consider the hull notch holes and to close the hull, and the amount of construction work is greatly reduced as compared with the conventional case.

[0024]

As described above in detail, the following effects can be obtained by the marine vessel propulsion motor and the method of installing the same according to the present invention. (1) Since a through hole for centering is formed along the center axis of the rotor shaft of the ship propulsion motor, the motor is installed inside the ship and the through hole of the rotor shaft is directly viewed. The centering work can be performed efficiently while keeping the see-through through. It is not necessary to perform such a troublesome work as performing marking on the ship and then installing the electric motor in the ship so as to match the marking. (2) In the case of a large-output marine propulsion motor, it is necessary to increase the secondary moment of area of the rotor shaft. However, as in the present invention, a through hole is provided in the rotor shaft and the rotor shaft is formed into a hollow structure. Then, the shaft cross-sectional area is reduced as compared with a solid rotor shaft having the same second moment of area, and the weight can be reduced. (3) When the motor is installed in the ship and the centering operation is performed, the marks indicating the center of the rotor shaft cross section described on each transparent plate at both ends of the through hole are aligned on the see-through line. By adjusting the position of the electric motor so as to cause the work efficiency to be improved. (4) In the method of the present invention, the centering operation of aligning the rotor shaft of the motor with the propeller shaft while allowing the light source to be seen through the through hole in the rotor shaft of the ship propulsion motor installed on the ship. However, the propulsion motor has been installed efficiently and properly, and the installation of the propulsion motor inside the ship has been carried out at an early stage. Consideration of the hull notch hole for moving into the ship after marking the position and the work of closing the hole are not required, and the amount of construction work is greatly reduced as compared with the conventional case.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a marine vessel propulsion motor according to an embodiment of the present invention.

FIG. 2 is a stern vertical sectional view showing the procedure of the method of the present invention for installing the boat propulsion motor of FIG. 1 in a boat.

FIG. 3 is a stern vertical cross-sectional view showing a conventional method of installing a marine propulsion motor.

FIG. 4 is a longitudinal sectional view of a conventional boat propulsion motor.

[Description of Signs] 1 Motor casing 2 Stator 3 Rotor shaft 4 Rotor 5 Light source 6 Slit 7 Propeller shaft 8 Stern tube 9 Propeller 10 Visual inspection hole position 11 Notch hole 12 Through hole 13, 14 Transparent with center mark Board

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhisa Yokoyama 1-1-1 Wadazakicho, Hyogo-ku, Kobe-shi Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Inventor Masahiro Nishiguchi 1-chome, Wadasakicho, Hyogo-ku, Kobe-shi No. 1-1 Inside Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Inventor Yasuki Kodama 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi Mitsubishi Heavy Industries, Ltd. Inside Kobe Shipyard (56) References JP-A-60-78888 ( JP, A) JP-A-48-93091 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B63H 21/17 B63H 23/34

Claims (3)

(57) [Claims] An electric motor mounted on a ship with a stern propeller shaft centerline and a rotor shaft centerline aligned for propulsion of a ship, wherein the motor penetrates the rotor shaft of the motor along the center axis thereof. An electric motor for ship propulsion, wherein a through hole for centering is formed. 2. The marine vessel propulsion motor according to claim 1, wherein a transparent plate is mounted on each of both ends of the through hole, and a mark indicating a center of a cross section of the rotor shaft is described on the transparent plate. An electric motor for ship propulsion, characterized in that: 3. A centering of a propeller shaft inserted through a stern tube and a rotor shaft of a motor driving the propeller shaft for installation of the motor for propulsion in a ship. A through-hole is formed in the rotor shaft along the center axis, the motor is installed inside the ship, and a light source is installed at a reference point in front of the rotor shaft of the motor. After performing centering so that the light source can be seen through the through hole of the rotor shaft from the peephole at the hull rear reference point on the line,
A method for installing a marine propulsion motor, comprising fixing the motor.